Patrolling the border from above

July 22, 2014

U.S. Border Patrol agents patrol the U.S.-Mexico border from the air

John Moore/Getty Images

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U.S. Border Patrol agents take undocumented immigrant families into custody on July 21, 2014 in McAllen, Texas. Thousands of immigrants, many of them minors from Central America, have crossed illegally into the United States this year, causing an unprecedented humanitarian crisis on the U.S.-Mexico border. Texas Governor Rick Perry announced that he will send 1,000 National Guard troops to help stem the flow.

John Moore/Getty Images

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U.S. Border Patrol agents take undocumented immigrant families into custody on July 21, 2014 in McAllen, Texas. Thousands of immigrants, many of them minors from Central America, have crossed illegally into the United States this year, causing an unprecedented humanitarian crisis on the U.S.-Mexico border. Texas Governor Rick Perry announced that he will send 1,000 National Guard troops to help stem the flow.